How to get the Curently Logged User IP Address

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Net;

public partial class _Default : System.Web.UI.Page

{

    protected void Page_Load(object sender, EventArgs e)

    {

        string strIPAddress = getclientIPAddress();

        Response.Write(strIPAddress);

    }

    public static string getclientIPAddress()

    {

        IPHostEntry host;

        string localIP = "?";

        host = Dns.GetHostEntry(Dns.GetHostName());

        foreach (IPAddress ip in host.AddressList)

        {

            if (ip.AddressFamily.ToString() == "InterNetwork")

            {

                localIP = ip.ToString();

            }

        }

        return localIP;

    }

}